A service of the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), National Institutes of Health (NIH)
The nitrogen cycle game helps you learn how nitrogen atoms move through various forms including soil, the atmosphere, plants and animals. Actions such as lightening, bacteria digestion, plant assimilation, plant death, animal death, herbivorism and nitrogen fixing plant bacteria move nitrogen from one form to another.
in the following video you can find a list of useful free on-line tools for DNA sequence analisys.
This resource is a video abstract of a research paper created by Research Square on behalf of its authors. It provides a synopsis that's easy to understand, and can be used to introduce the topics it covers to students, researchers, and the general public. The video's transcript is also provided in full, with a portion provided below for preview:
"Excessive fat accumulation in pigs reduces economic returns in the pig industry. In humans and mice, the gut microbiome plays a role in host metabolism and fat accumulation, but the effects of a modern high-energy, high-protein diet on the gut microbiome and fat accumulation in pigs is not yet known. A recent study investigated the correlation between gut microbiome changes and fat accumulation in duroc pigs. They found that Prevotella copri abundance in the gut was positively associated with fat accumulation as well as increased obesity-related serum metabolite, increased host intestinal barrier permeability, and chronic inflammation. To examine causality, researchers isolated P. copri from pigs and administered it to germ-free mice. Treated mice showed similar phenotypes to pigs with high levels of P. copri, which included increased fat accumulation and altered serum metabolites..."
The rest of the transcript, along with a link to the research itself, is available on the resource itself.
Students reinforce their knowledge of the different parts of the digestive system and explore the concept of simulation by developing a pill coating that can withstand the churning actions and acidic environment found in the stomach. Teams test the coating durability by using a clear soda to simulate stomach acid.
This lecture with slides introduces the functions of ruminant animals, parts and processes of the ruminant digestive system, and details the first two components of the digestive system of ruminant animals. Created by: Arelene Barrett, Dennis Bratton, Mariah Gumphry, Haley Vrazel
This resource is a video abstract of a research paper created by Research Square on behalf of its authors. It provides a synopsis that's easy to understand, and can be used to introduce the topics it covers to students, researchers, and the general public. The video's transcript is also provided in full, with a portion provided below for preview:
"Farmed chickens often suffer from intestinal inflammation which negatively affects their feed intake, digestion, and growth performance. The gut microbial community has a known close relationship with growth performance, but how, or if, this microbiota influences intestinal inflammation is not yet known. To test this, researchers examined the microbiota in young chickens, focusing on the jejunum section of the gut. They found that 7-week-old chickens with high body weight tended to have a microbiota dominated by gram-positive bacteria, like Lactobacilli. But lower-body-weight chickens had a microbiota dominated by gram-negative bacteria, like Escherichia-Shigella. Gram-negative bacteria carry endotoxin (lipopolysaccharide), and consequently, these lower body weight chickens had more of it in their bloodstream. These elevated lipopolysaccharide levels activated inflammatory cytokines in the jejunum, causing damage to the gut barrier..."
The rest of the transcript, along with a link to the research itself, is available on the resource itself.
This resource is a video abstract of a research paper created by Research Square on behalf of its authors. It provides a synopsis that's easy to understand, and can be used to introduce the topics it covers to students, researchers, and the general public. The video's transcript is also provided in full, with a portion provided below for preview:
"The rumen is the largest compartment of the ruminant forestomach and houses a complex microbiome. That microbiome greatly influences gut energy harvesting capacity. Improving our understanding of the mechanisms that influence energy harvesting capacity could be used to optimize ruminant feed efficiency and management. Thus, researchers recently examined temporal ecological interactions at the plant-biofilm interface by incubating fresh perennial ryegrass in cattle rumens and analyzing the bacterial diversity and gene expression at several time points. Network analysis identified two sub-microbiomes. They represented the primary (<4h) and secondary (>4h) colonization phases. Several of the most transcriptionally active microbial families didn't interact with either sub-microbiome, which suggests non-cooperative behavior. Conversely, the putative keystone families of each sub-microbiome had low transcriptional activity..."
The rest of the transcript, along with a link to the research itself, is available on the resource itself.